malefaction, n. crime, wrongdoing, offense, transgression, breach, contravention; violation, trespass, encroachment, infringement; wrong, malfeasance, felony, Law. tort, Law. malversation, foul play; misdeed, misfeasance, hurt, harm, dirty trick, foul; atrocity, enormity, monstrosity, outrage, horror, abomination. malefact, n. 1. criminal, felon, larcener, larcenist, misdemeanant, lawbreaker; convict, Sl. jailbird, parol ee, exconvict, Inf ex-con, recidivist, repeat offender, Inf chronic crook; transgressor, trespasser, offender, culprit, miscreant; wrongdoer, evildoer, sinner; malfeasant, misfeasor; perjurer; Inf. scofflaw.
2. gangster, mobster, racketeer, mafioso, desperado, terrorist; thug, U.S. tough, Inf. toughie, mugger, ruffian, Inf. plugugly, rowdy, hoodlum, Sl. hood, Inf. goon, hooligan, Chiefly Brit, rough, Inf roughneck, Inf baddy, Sl. bad actor, Sl. gunsel, Sl. mug, Australian Sl. larrikin, Brit. Hist. Mohock, (in Paris) apache.
3. assassin, murderer, killer, slayer, sniper; strangler, cutthroat, garroter; liquidator, Euph. silencer, Euph. dispatcher; gunman, All U.S. Sl. gun, hired gun, hit man, triggerman, hatchet man, torpedo.
4. bandit, hold-up man, Sl. stick-up man, armed robber; robber, burglar, thief, stealer, purloiner, Inf. crook; cracksman, Raffles, second-story man, cat thief; shoplifter, pickpocket, purse-snatcher, cutpurse; embezzler, peculator, Law. defalcator.
5. highwayman, footpad, Sl. yegg or yeggman, outlaw, Sp. bandolero, Southwest U.S. ladrone, Australian. bushranger, bravo, brigand; picaroon, rogue, (in India and Burma) dacoit.
6. extortionist, blackmailer, usurer, loan shark, Sl. bleeder; smuggler, runner, bootlegger, contrabandist, white-slaver; swindler, trickster, sharper, confidence man, con artist, con man; forger, counterfeiter, Fr. faux-monnayeur, Brit. Inf. coiner.
7. kidnapper, abductor, rapist; sodomist, pervert, degenerate, child molester, Sl. short eyes.
8. arsonist, incendiary; rioter, revolutionary, insurgent; bomb-thrower, bomb-planter.
9. villain, blackguard, reprobate, miscreant, knave, wretch, Archaic, caitiff; scapegrace, scoundrel, rogue, Archaic, varlet, scamp, Inf scalawag, rapscallion; monster, demon, devil, hellhound, fiend; imp, rascal, mischief:maker. maleficent, adj. 1. pernicious, perilous, inimical, hurtful, harmful, baleful, baneful, deleterious, injurious, pestilential, pestiferous, noxious, detrimental, destructive; deadly, lethal, Obs. lethiferous, fatal, poisonous, toxic.
2. malign, malignant, malevolent, malicious, malef ic, evil-intentioned, evil-disposed; hostile, antagonistic, unfriendly, obnoxious, ill-natured, churlish, surly; depraved, degenerate, debased, evil, villainous, base, vile, foul, heinous, atrocious; inhuman, Archaic, im-mane, unnatural, pitiless, merciless, unfeeling; implacable, relentless, grim, black-hearted, hard-hearted, cold-blooded, vicious, harsh, oppressive, cruel; ruthless, brutal, truculent, ferocious, savage, bloodthirsty, murderous, homicidal, feral, ferine; fiendish, demoniac, diabolic, evil-minded, fell, devilish, satanic, hellish, infernal. malevolence, n. 1. malice, maliciousness, malignity, malignance, animosity, antagonism, hostility, hate, hatred, enmity, wrath, violence, ferocity, anger, dudgeon, bad blood; venom, rancor, ill will, spite, spitefulness, grudge, pique, ire, acrimony, acerbity, bitterness; gall, bile, spleen, virulence, invidiousness, envy, resentment.